add more detail to the installation instructions
add more detail to the installation instructions

Signed-off-by: Bryan Helmkamp <0a3ba1af216659500dd8f41e29f3979f42452870@brynary.com>
abak-press/rack-insight,pboling/rack-insight,brynary/rack-bug,pboling/rack-insight,brynary/rack-bug,abak-press/rack-insight,abak-press/rack-insight,LRDesign/logical-insight,pboling/rack-insight,LRDesign/logical-insight